The peanut butter you buy a month from now hasn't been manufactured yet but the grocery store already has their order in. The grocery store is borrowing money to pay wages for shifts that haven't been worked yet. The peanut butter manufacturer is placing orders to peanut farms for peanuts that haven't been harvested yet. The shipping truck manufacturer is putting in orders for tires, wheels, locking mechanisms, and trailers that don't exist yet, so on and so forth for almost everything in the supply chain.
No great injustice, just business as usual.